Post Ab64EScPHim4DmKZiC by Romaq@qoto.org
 (DIR) More posts by Romaq@qoto.org
 (DIR) Post #Ab295aKC7iHvb5ngpM by freemo@qoto.org
       2023-10-22T16:21:43Z
       
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       This is a photo I took 13 years ago of Jupiter and 4 of its moons (top). As a reference the image below is the simulated position at that same time.#Jupiter #Astronomy #Astrophotography #SpaceQT: https://jeffreyfreeman.me/photography/jupiter-moons/
       
 (DIR) Post #Ab2APnL9XebRi4RvSi by SteelFolk@qoto.org
       2023-10-22T16:36:37Z
       
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       @freemo Incredible how sailors used the moons to find longitude with such primitive kit, ain't it.
       
 (DIR) Post #Ab2BbvKhkb6hvbaSqe by freemo@qoto.org
       2023-10-22T16:49:59Z
       
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       @SteelFolk wait, they used the moons of jupiter? Thats news to me.
       
 (DIR) Post #Ab3W1oo7gqNQW6gvXE by SteelFolk@qoto.org
       2023-10-22T20:43:31Z
       
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       @freemo Yup. They looked different depending on where you were somehow and almanacks were made to refer to. From a ship at sea before decent clocks were available.
       
 (DIR) Post #Ab3WJoYRMwwKwdwA1w by hans@hubzilla.hopto.org
       2023-10-22T20:49:26Z
       
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       oftwel, zonneschieter en maan phases ( 7 stuks )
       
 (DIR) Post #Ab3WPh7nuBVfdjHXge by hans@hubzilla.hopto.org
       2023-10-22T20:45:10Z
       
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       They used the Sun too, and the moon
       
 (DIR) Post #Ab64EScPHim4DmKZiC by Romaq@qoto.org
       2023-10-24T13:46:11Z
       
       0 likes, 1 repeats
       
       @freemohttps://medium.com/@domchang/jupiters-moons-and-the-speed-of-light-e86ee8b96dThere was a better article specific to the history of navigation, but I can't find it now. It was a horrible pain in the ass to do ESPECIALLY while at sea, and then it was discovered there was discrepancy related to distance which led to a better estimation of the speed of light. This was just about the time seaworthy time pieces came online.BTW, I'm using a link to your photo for flerf discussion, among other such images. It boggles my mind how one can't just use a pair of binoculars to make observations that shut down flerf, but people are weird like that.@SteelFolk